Non-bursate nematodes Flashcards
non-bursate nematodes taxonomy
kingdom- Animalia
phylum-Nematoda- non-bursate
oxyurida alt name
pinworms
oxyurida taxonomy
kingdom- Animalia
phylum-Nematoda- non-bursate
order- oxyurida
oxyurida life cycle
- direct life cycle
oxyurida id
- short esophagus w/ bulb at base
- pointed tail
oxyurida organ effected
cecum and colon
oxyuris equi taxonomy
kingdom- Animalia
phylum-Nematoda- non-bursate
order- oxyurida
oxyuris equi host
equids
oxyuris equi lifecycle
Gravid females travel to rectum & out through anus -> Deposit eggs on perianal skin -> Larvae develop in egg -> Eggs ingested -> Larvae hatch in small intestine
oxyuris equi organ
cecum and colon
oxyuris equi dx
- puritis ani ie itchy butt and horse rubs everywhere spreading eggs
oxyuris equi geography
world wide
enterobius vermicularis alt name
human pinworm
enterobius vermicularis taxonomy
kingdom- Animalia
phylum-Nematoda- non-bursate
order- oxyurida
enterobius vermicularis life cycle
- direct
- Gravid females travel to rectum & out through anus -> Deposit eggs on perianal skin -> Larvae develop in egg -> Eggs ingested -> Larvae hatch in small intestine
enterobius vermicularis id
- eggs flat on one side
- eggs can also hatch at deposition site then crawl back through anus into rectum until reach colon
enterobius vermicularis organ effected
large intestine and rectum
enterobius vermicularis dx
Little harm
- Puritis ani - Heavy infection cause intestinal irritation
- Female worms can migrate into vagina causing vaginitis
enterobius vermicularis location
world wide in cooler climates
enterobius vermicularis get how
ONLY IN PPL GET IT FROM EACH OTHER
enterobius vermicularis tx
treat entire family with pyrantel
ascaridida taxonomy
kingdom- Animalia
phylum-Nematoda- non-bursate
order- ascaridida
ascaridida host
- fish, amphibian, reptiles, birds, mammals
- intermediate or paratenic hosts
ascaridida id
large and cream colored
ascaridida organ/ cell effected
small intestine and stomach
ascaris suum taxonomy
kingdom- Animalia
phylum-Nematoda- non-bursate
order- ascaridida
ascaris suum host
swine
- zoonotic (larvae only)
ascaris suum id
males a foot long and females longer
ascaris suum life cycle
- Direct life cycle egg w/ L3 ingested -> Hatches -> Migrate to liver & lungs -> C up & swallowed -> Develop to adults in small intestine
ascaris suum dx
- interfere with nutrition
- liver migrations cause mechanical damage, hypersensitive, milk spots
- lung migrations cause mechanical damage, inflam
ascaris suum geo
cosmopolitan
parascaris equorum taxonomy
kingdom- Animalia
phylum-Nematoda- non-bursate
order- ascaridida
parascaris equorum host
- young horses < 1 yr
parascaris equorum id
LONG longer than ascaris suum which are a foot long
parascaris equorum lifecycle
- direct
- egg w/ L3 ingested -> Hatches -> Migrate to liver & lungs -> C up & swallowed -> Develop to adults in small intestine
parascaris equorum organ effected
small intestine
parascaris equorum dx
- enteritis, gut perforation, intestinal blockage, liver spots, lung disease
parascaris equorum loation
cosmopolitan
parascaris equorum tx
resistant to ivermectin
toxocara canis taxonomy
kingdom- Animalia
phylum-Nematoda- non-bursate
order- ascaridida
toxocara canis host
- dogs
- also use paratenic
- ZOONOTIC
toxocara canis lifecycle
Eggs in feces become infective in soil -> Ingested -> Larva migrate through liver & lungs to small intestine
- If trans- placental larva arrest in bitch then migrate into puppy during preg -> Found in liver & lungs at birth
toxocara canis transmission
- transplacental
- can be infected w/ egg or larvae in paratenic host
toxocara canis organ effected
small intestine
toxocara canis dx
- rupture of intestinal mucosa, impaction, distended abdomen
- pups born die with these lesions several weeks old
toxocara canis ppl dx/ larvae where
- ZOONOTIC
- visceral larval migrant in ppl (25% of Americans)
- larvae in liver, skeletal muscle, brain
toxocara canis ppl infected how
ppl infected by ingesting infective eggs passed in dog feces
toxocara cati taxonomy
kingdom- Animalia
phylum-Nematoda- non-bursate
order- ascaridida
toxocara cati host
- cats
- zoonotic
toxocara cati transmissio
- ingesting eggs or paratenic hosts
- no transmammary transmission
toxocara cati organ effected
small intestine
toxocara cati dx
not as severe as toxocara canis (still see intestinal/ gi dx?)
toxocara cati dx ppl
- visceral larval migrant in ppl
- larvae in liver, skeletal muscle, brain
toxocara vitulorum taxonomy
kingdom- Animalia
phylum-Nematoda- non-bursate
order- ascaridida
toxocara vitulorum host
- cattle
- water baffalo
toxocara vitulorum transmission
transmammary
toxocara vitulorum organ effected
small intestine
toxocara vitulorum dx
- calves die several weeks old like w/ toxocaris canis
toxocara vitulorum location
- tropics
- occasionally us
toxacaris leonina taxonomy
kingdom- Animalia
phylum-Nematoda- non-bursate
order- ascaridida
toxacaris leonina host
- dog, cat, fox
toxacaris leonina lifecycle
- direct
- Eggs in feces -> Larvate very quickly -> Swallowed by final host -> Develop in bowel lumen
toxacaris leonina organ effected
small intestine
toxacaris leonina dx
no significant pathology
toxacaris leonina location
- cooler climate
baylisascaris procyonosis alt name
raccoon roundworm
baylisascaris procynosis taxnomy
kingdom- Animalia
phylum-Nematoda- non-bursate
order- ascaridida
baylisascaris procynosis transmission
- Eggs shed by raccoon then eaten by other animals & larvae migrate through CNS causing death
- Dogs probably infected by eating rodents
baylisascaris procynosis dx
- severe and deadly dx in children if they ingest eggs
- ocular lesions in adult
baylisascaris procynosis host
- raccoons, adult dogs
- zoonotic
baylisascaris procyonosis humans dx
- ZOONOTIC
- visceral larval migrant in ppl (25% Americans)
- larvae in liver, skeletal muscle, brain
anisakis and pseudoterranova taxonomy
kingdom- Animalia
phylum-Nematoda- non-bursate
order- ascaridida
anisakis and pseudoterranova host
- sea mammals- mainly toothed whales and pinnipeds
- crustacean 1st intermediate
- various fish paratenic
- humans
anisakis and pseudoterranova lifecycle
- embed heads into mucosa and attach to empty stomach wall
- when stomach fills w/ food they detach and migrate into food to feed
anisakis and pseudoterranova organ effected
stomach or small intestine
anisakis and pseudoterranova in humans
- visceral larval migrant in ppl (25% of Americans)
- larvae in liver, skeletal muscle, brain
- get it form eating sushi
pseudoterranova taxonomy
kingdom- Animalia
phylum-Nematoda- non-bursate
order- ascaridida
pseudoterranova final host + larvae found where
- final: seal
- larvae: cod and haddock
pseudoterranova lifecycle
- embed heads into mucosa and attach to empty stomach wall
- when stomach fills w/ food they detach and migrate into food to feed
- worms migrate up esophagus and cough out
pseudoterranova larvae humans
- larvae migrate out of humans after ingestion
anisakis taxonomy
kingdom- Animalia
phylum-Nematoda- non-bursate
order- ascaridida
anisakis host
- toothed whales
- larvae in salmonids, tuna, other fish
anisakis dx
- cause dx in ppl when larvae enter stomach wall